Maybe you should take it up in the Northscale forums ( http://www.northscale.com/support/policies.html).
On Tue, Oct 5, 2010 at 9:26 AM, Brandon Casci <[email protected]>wrote: > The problem for me isn't the exception vs miss, it's data reliability. > > > On Tue, Oct 5, 2010 at 10:19 AM, Keenan Brock <[email protected]>wrote: > >> Hi Brandon, >> >> Once, I had changed my memcache client library and it started raising >> exceptions. >> Turns out the previous library just returned a nil, while this one raised >> an exception. So I hacked the library to return nil on failures rather than >> throw exceptions. >> >> (The previous library just returned a nil not failing) >> >> >> This seems like the answer for me. >> >> Maybe alter the gem and add the option to throw an exception instead of >> returning a nil. >> >> >> But it is curious that it would fail so many times. >> >> --Keenan >> >> On Oct 5, 2010, at 9:25 AM, Brandon Casci wrote: >> >> It took a few days for the ticket to get answered, but yesterday did get >> confirmation from Heroku that this was a problem, with Amazon EC2 causing >> the pain. See this: >> >> >> http://getsatisfaction.com/heroku/topics/sporadic_errors_with_memcache_addon >> >> I have the same symptoms they mention, though for my app it's not >> sporadic, it's a state. The only way I can seem to shake it is by opening >> the rails console and doing Rails.cache.clear, and things go back to normal >> until problem kicks back up again. >> >> I'd rate this problem a 9.5 out of 10 for my app. >> >> What makes things particularly difficult for me is input comes in from >> outside sources and sits in memcache. In this case, what a radio station is >> currently playing, and it should stay there until the next time until new >> data comes in via the API. I suppose it's fair to say that data should be >> placed in the DB, which is fine. I can do that, and then do a >> Rails.cache.fetch from there. Any miss would mean another AR query instead >> of a nil. That's still a problem though, because a lot of supplementary data >> gets queried with the song title, artwork, photos, products and more. So all >> those cache misses will have a recognizable negative impact. >> >> >> >> >> On Tue, Oct 5, 2010 at 9:13 AM, John Norman <[email protected]> wrote: >> >>> Brandon: Regretably, I'm cheating and am using the Dalli gem without the >>> guidance of Heroku. :-( I couldn't get memcached-northscale to compile on my >>> Mac. Whatever. >>> >>> In any case: >>> >>> >> Rails.cache.write "foo", "bar" >>> => true >>> >> Rails.cache.read "foo" >>> => "bar" >>> >> Rails.cache.read "foo" >>> => "bar" >>> >> Rails.cache.read "foo" >>> => "bar" >>> >> Rails.cache.read "foo" >>> => "bar" >>> >> Rails.cache.read "foo" >>> => "bar" >>> >> Rails.cache.read "foo" >>> => "bar" >>> >> Rails.cache.read "foo" >>> => "bar" >>> >> Rails.cache.read "foo" >>> => "bar" >>> >> Rails.cache.read "foo" >>> => "bar" >>> >> Rails.cache.read "foo" >>> => "bar" >>> >> Rails.cache.read "foo" >>> => "bar" >>> >> Rails.cache.read "foo" >>> => "bar" >>> >> Rails.cache.read "foo" >>> => "bar" >>> >>> >>> >>> On Mon, Oct 4, 2010 at 3:53 PM, Brandon Casci <[email protected]>wrote: >>> >>>> Yep :) >>>> >>>> >>>> On Mon, Oct 4, 2010 at 4:48 PM, Teng Siong Ong <[email protected]>wrote: >>>> >>>>> are you sure that you are using the supported memcache gem? >>>>> http://docs.heroku.com/memcache >>>>> >>>>> On Mon, Oct 4, 2010 at 3:43 PM, Brandon Casci >>>>> <[email protected]>wrote: >>>>> >>>>>> It's crazy making. >>>>>> >>>>>> >> Rails.cache.read "mykey" >>>>>> => nil >>>>>> >> Rails.cache.read "mykey" >>>>>> => nil >>>>>> >> Rails.cache.read "mykey" >>>>>> => nil >>>>>> >> Rails.cache.read "mykey" >>>>>> => 1 >>>>>> >> Rails.cache.read "mykey" >>>>>> => nil >>>>>> >> Rails.cache.read "mykey" >>>>>> => nil >>>>>> >> Rails.cache.read "mykey" >>>>>> => 1 >>>>>> >> Rails.cache.read "mykey" >>>>>> => nil >>>>>> >> Rails.cache.read "mykey" >>>>>> => nil >>>>>> >>>>>> >>>>>> On Sat, Oct 2, 2010 at 7:58 PM, Brandon Casci <[email protected] >>>>>> > wrote: >>>>>> >>>>>>> Hello >>>>>>> >>>>>>> I'm new to Heroku, so I'm not sure if this is a problem, or normal >>>>>>> behavior. >>>>>>> >>>>>>> I'm seeing a inconsistent memcache reads. Reading a key will >>>>>>> sometimes alternate between nil and the value placed in memcache. Other >>>>>>> times the value just seems to vanish, though that could be a sign that >>>>>>> memcache is full, though I can't find a way to tell if it's full. >>>>>>> >>>>>>> What do es everyone think might be happening? >>>>>>> >>>>>>> >>>>>>> >>>>>>> -- >>>>>>> ========================================= >>>>>>> Brandon Casci >>>>>>> Loudcaster >>>>>>> http://loudcaster.com >>>>>>> ========================================= >>>>>>> >>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> ========================================= >>>>>> Brandon Casci >>>>>> Loudcaster >>>>>> http://loudcaster.com >>>>>> ========================================= >>>>>> >>>>>> -- >>>>>> You received this message because you are subscribed to the Google >>>>>> Groups "Heroku" group. >>>>>> To post to this group, send email to [email protected]. >>>>>> To unsubscribe from this group, send email to >>>>>> [email protected]<heroku%[email protected]> >>>>>> . >>>>>> For more options, visit this group at >>>>>> http://groups.google.com/group/heroku?hl=en. >>>>>> >>>>> >>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "Heroku" group. >>>>> To post to this group, send email to [email protected]. >>>>> To unsubscribe from this group, send email to >>>>> [email protected]<heroku%[email protected]> >>>>> . >>>>> For more options, visit this group at >>>>> http://groups.google.com/group/heroku?hl=en. >>>>> >>>> >>>> >>>> >>>> -- >>>> ========================================= >>>> Brandon Casci >>>> Loudcaster >>>> http://loudcaster.com >>>> ========================================= >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Heroku" group. >>>> To post to this group, send email to [email protected]. >>>> To unsubscribe from this group, send email to >>>> [email protected]<heroku%[email protected]> >>>> . >>>> For more options, visit this group at >>>> http://groups.google.com/group/heroku?hl=en. >>>> >>> >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Heroku" group. >>> To post to this group, send email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]<heroku%[email protected]> >>> . >>> For more options, visit this group at >>> http://groups.google.com/group/heroku?hl=en. >>> >> >> >> >> -- >> ========================================= >> Brandon Casci >> Loudcaster >> http://loudcaster.com >> ========================================= >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Heroku" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/heroku?hl=en. >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Heroku" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]<heroku%[email protected]> >> . >> For more options, visit this group at >> http://groups.google.com/group/heroku?hl=en. >> > > > > -- > ========================================= > Brandon Casci > Loudcaster > http://loudcaster.com > ========================================= > > -- > You received this message because you are subscribed to the Google Groups > "Heroku" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<heroku%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/heroku?hl=en. > -- You received this message because you are subscribed to the Google Groups "Heroku" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/heroku?hl=en.
